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Anthropic's Claude Sonnet 4.5 to be retired November 30, 2026

By PulseAugur Editorial · [1 sources] ·

Anthropic's Claude Sonnet 4.5 model is scheduled for deprecation and will be removed from the Claude API on November 30, 2026. This change affects users across various platforms, including Amazon Bedrock and Google Cloud, which will need to transition their integrations. Developers should prepare for the retirement of Sonnet 4.5 and consider migrating to newer versions to avoid service disruptions. AI

IMPACT Developers using Claude Sonnet 4.5 must migrate to newer models by November 30, 2026, to avoid service disruptions.

RANK_REASON This is a deprecation notice for a specific model version, not a new release or significant industry event.

Read on Mastodon — mastodon.social →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

Anthropic's Claude Sonnet 4.5 to be retired November 30, 2026

How we ranked this

Signal score
13 / 100
Composite score across the factors below. Higher = stronger signal that this story matters right now.
Newsworthiness bucket
Tool
This is a deprecation notice for a specific model version, not a new release or significant industry event.
Source corroboration
Single-source cluster
Only one publisher covered this so far. Single-source stories can still rank when the publisher is high-authority, but they lack cross-source corroboration.
Topics
model release
Editorial topic classification. Feeds into how the story surfaces on /topic/<slug> hub pages and into the per-entity coverage mix.
AI-industry relevance
High
Clearly on-topic for AI-industry coverage.
Story freshness
Breaking (< 6h)
Fresh story with cross-source coverage still developing. Ranking may shift as more sources report.

Full methodology in our editorial standards.

COVERAGE [1]

  1. Mastodon — mastodon.social TIER_1 English(EN) · madrobotblog ·

    Claude Sonnet 4.5 retires on November 30: every date, what breaks and how to switch Claude Sonnet 4.5 is deprecated and leaves the Claude API on November 30, 20

    Claude Sonnet 4.5 retires on November 30: every date, what breaks and how to switch Claude Sonnet 4.5 is deprecated and leaves the Claude API on November 30, 2026. Bedrock and Google Cloud dates, what breaks on Sonnet 5.5, what to do. # Claude # Developers # AI https:// madrobot.…

    LINKS madrobot.blog/…/claude-sonnet-4-5-retirem…

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